| P and B Panelcraft Ltd | Other services | 2017 |
| P C G Property Limited | Real estate | 2018 |
| P G Evans Transport Ltd | Transport & logistics | 2024 |
| P G Tooling Limited | Manufacturing | 2003 |
| P K Ashdown LLP | | 2006 |
| P L S Shenfield Ltd | Wholesale & retail | 2025 |
| P M Smith Autos Limited | Wholesale & retail | 2015 |
| P S Medicare Limited | Health & social care | 2009 |
| P W Risk Consulting Ltd | Information & communication | 2011 |
| P&H Mcneilly Limited | Professional & scientific | 2006 |
| P&W Company Ltd | Wholesale & retail | 2015 |
| P.A. Bray Limited | Construction | 1976 |
| P.B. Martin Building & Landscape Ltd | Construction | 2015 |
| P.C Voice Services Limited | Information & communication | 2013 |
| P.E.Beaumont Limited | Real estate | 1955 |
| Pabtech Associates Limited | Arts & recreation | 2018 |
| Pacalis (Edenbridge) Limited | Hospitality | 2018 |
| Packaging Mode Ltd. | Other services | 2011 |
| PAD Capital Ltd | Real estate | 2023 |
| Paddocks Green (Kingsbury) Limited | Households | 2015 |
| Paddy Lennox Comedy Limited | Arts & recreation | 2017 |
| Padeca Ltd | Real estate | 2022 |
| Padel Clubhouse Limited | Arts & recreation | 2024 |
| Pads Property Development Limited | Construction | 2022 |
| Page Tipping Limited | Transport & logistics | 2000 |
| Paid in Profit Limited | Financial services | 2021 |
| Paifor Limited | Real estate | 2021 |
| Painters Mews Limited | Households | 2017 |
| Paleplace Limited | Other services | 1999 |
| Palesa Butcher Limited | Information & communication | 2025 |
| Palessa Limited | Information & communication | 2025 |
| Palmer Professional Solutions Ltd | Administrative & support | 2022 |
| Pals Media Consultancy Limited | Administrative & support | 2016 |
| Pamina Estates Limited | Real estate | 2015 |
| Pamina Properties Limited | Construction | 2019 |
| Pamper ME Pretty & Co Limited | Arts & recreation | 2023 |
| Panache Fire Services Limited | Other services | 2009 |
| Panda Software Limited | Information & communication | 2024 |
| Pandamia Ltd | Construction | 2022 |
| Pangea Logistics Network Ltd | Other services | 2010 |
| Pantheon Hotels and Leisure Limited | Hospitality | 1981 |
| Pantiles FM Ltd | Construction | 2021 |
| Paolo Homes Limited | Real estate | 2015 |
| Paraho Limited | Wholesale & retail | 2025 |
| Parakram Ltd | Wholesale & retail | 2014 |
| Paramount Executive Property Ltd | Real estate | 2018 |
| Parcel Broker Ltd | Transport & logistics | 2023 |
| Pardn Properties Ltd | Real estate | 2023 |
| Pare Analytics Ltd | Information & communication | 2023 |
| Parex Capital Limited | Financial services | 2025 |
| Park Farm Barns (Stone Curlew) Management Company Limited | Households | 2018 |
| Park Services (Midlands) Limited | Administrative & support | 2008 |
| Parker Rose Recruitment Ltd | Administrative & support | 2017 |
| Parker Smith Inclusion Limited | Administrative & support | 2021 |
| Parkside Community Centre | Administrative & support | 2023 |
| Parkstone Landscapes (UK) Ltd | Construction | 2007 |
| Parkvale Property Limited | Construction | 2019 |
| Parkvale Support Services Ltd | Administrative & support | 2018 |
| Parkview Developments (South) Limited | Construction | 2015 |
| Parkwell Consulting Limited | Professional & scientific | 1998 |
| Parth Private Limited | Wholesale & retail | 2024 |
| Partners Corportation Ltd | Information & communication | 2023 |
| Partstoyou Limited | Wholesale & retail | 2026 |
| Party Tales Ltd | Wholesale & retail | 2021 |
| Parvum (Europe) Ltd | Manufacturing | 2013 |
| Pasadena Padel Club Ltd | Wholesale & retail | 2024 |
| Paschahōuse Ltd | Administrative & support | 2024 |
| Pathman Consultants Ltd | Information & communication | 2014 |
| Patientcards Ltd | Administrative & support | 2018 |
| Patina Investments Limited | Other services | 2002 |
| Patrol Scaffolding Alarms Limited | Administrative & support | 2005 |
| Patterned Music Ltd | Information & communication | 2023 |
| Paul Durston Limited | Construction | 2013 |
| Paul Jackson Solutions Ltd | Professional & scientific | 2022 |
| Paul&Brigione Ltd | Wholesale & retail | 2019 |
| Pawfect Friends C.I.C. | Other services | 2024 |
| Pawtopia Dog Care Services Limited | Other services | 2019 |
| Paydence Ltd | Professional & scientific | 2026 |
| PAYG8 Ltd | Financial services | 2025 |
| Paynomics Limited | Financial services | 2023 |
| Payze and Langford Limited | Wholesale & retail | 1938 |
| PB Electrical Installation and Maintenance Ltd | Construction | 2007 |
| PB QS Services Limited | Professional & scientific | 2021 |
| PC Autos Grays Ltd. | Wholesale & retail | 2020 |
| PCE Football Ltd | Education | 2022 |
| Pcos Limited | Administrative & support | 2006 |
| PDB Consulting Ltd | Professional & scientific | 2007 |
| Pdsr Properties Ltd | Real estate | 2024 |
| Peachmine Ltd. | Administrative & support | 2014 |
| Peak Group (Woodcote) Ltd | Construction | 2021 |
| Peak Group M&E Ltd | Real estate | 2016 |
| Peak Performance Studio Essex Ltd | Arts & recreation | 2019 |
| Peak Property Limited | Real estate | 2009 |
| Peak Storage Solutions Ltd | Transport & logistics | 2025 |
| Peak Supplies Ltd | Transport & logistics | 2016 |
| Peared Ltd | Information & communication | 2026 |
| Pearl London Limited | Other services | 2010 |
| Pearl PM Ltd | Professional & scientific | 2024 |
| Pearly Gate Maintenance Ltd | Professional & scientific | 2015 |
| Pearson Charles Consultancy Limited | Professional & scientific | 2001 |